diff options
Diffstat (limited to 'tools/libxc/xc_domain.c')
| -rw-r--r-- | tools/libxc/xc_domain.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c index 3210e34a73..81316d3c7f 100644 --- a/tools/libxc/xc_domain.c +++ b/tools/libxc/xc_domain.c @@ -21,6 +21,8 @@ */ #include "xc_private.h" +#include "xc_core.h" +#include "xg_private.h" #include "xg_save_restore.h" #include <xen/memory.h> #include <xen/hvm/hvm_op.h> @@ -1477,6 +1479,131 @@ int xc_domain_bind_pt_isa_irq( PT_IRQ_TYPE_ISA, 0, 0, 0, machine_irq)); } +int xc_unmap_domain_meminfo(xc_interface *xch, struct xc_domain_meminfo *minfo) +{ + struct domain_info_context _di = { .guest_width = minfo->guest_width }; + struct domain_info_context *dinfo = &_di; + + free(minfo->pfn_type); + if ( minfo->p2m_table ) + munmap(minfo->p2m_table, P2M_FLL_ENTRIES * PAGE_SIZE); + minfo->p2m_table = NULL; + + return 0; +} + +int xc_map_domain_meminfo(xc_interface *xch, int domid, + struct xc_domain_meminfo *minfo) +{ + struct domain_info_context _di; + struct domain_info_context *dinfo = &_di; + + xc_dominfo_t info; + shared_info_any_t *live_shinfo; + xen_capabilities_info_t xen_caps = ""; + int i; + + /* Only be initialized once */ + if ( minfo->pfn_type || minfo->p2m_table ) + { + errno = EINVAL; + return -1; + } + + if ( xc_domain_getinfo(xch, domid, 1, &info) != 1 ) + { + PERROR("Could not get domain info"); + return -1; + } + + if ( xc_domain_get_guest_width(xch, domid, &minfo->guest_width) ) + { + PERROR("Could not get domain address size"); + return -1; + } + _di.guest_width = minfo->guest_width; + + /* Get page table levels (see get_platform_info() in xg_save_restore.h */ + if ( xc_version(xch, XENVER_capabilities, &xen_caps) ) + { + PERROR("Could not get Xen capabilities (for page table levels)"); + return -1; + } + if ( strstr(xen_caps, "xen-3.0-x86_64") ) + /* Depends on whether it's a compat 32-on-64 guest */ + minfo->pt_levels = ( (minfo->guest_width == 8) ? 4 : 3 ); + else if ( strstr(xen_caps, "xen-3.0-x86_32p") ) + minfo->pt_levels = 3; + else if ( strstr(xen_caps, "xen-3.0-x86_32") ) + minfo->pt_levels = 2; + else + { + errno = EFAULT; + return -1; + } + + /* We need the shared info page for mapping the P2M */ + live_shinfo = xc_map_foreign_range(xch, domid, PAGE_SIZE, PROT_READ, + info.shared_info_frame); + if ( !live_shinfo ) + { + PERROR("Could not map the shared info frame (MFN 0x%lx)", + info.shared_info_frame); + return -1; + } + + if ( xc_core_arch_map_p2m_writable(xch, minfo->guest_width, &info, + live_shinfo, &minfo->p2m_table, + &minfo->p2m_size) ) + { + PERROR("Could not map the P2M table"); + munmap(live_shinfo, PAGE_SIZE); + return -1; + } + munmap(live_shinfo, PAGE_SIZE); + _di.p2m_size = minfo->p2m_size; + + /* Make space and prepare for getting the PFN types */ + minfo->pfn_type = calloc(sizeof(*minfo->pfn_type), minfo->p2m_size); + if ( !minfo->pfn_type ) + { + PERROR("Could not allocate memory for the PFN types"); + goto failed; + } + for ( i = 0; i < minfo->p2m_size; i++ ) + minfo->pfn_type[i] = pfn_to_mfn(i, minfo->p2m_table, + minfo->guest_width); + + /* Retrieve PFN types in batches */ + for ( i = 0; i < minfo->p2m_size ; i+=1024 ) + { + int count = ((minfo->p2m_size - i ) > 1024 ) ? + 1024: (minfo->p2m_size - i); + + if ( xc_get_pfn_type_batch(xch, domid, count, minfo->pfn_type + i) ) + { + PERROR("Could not get %d-eth batch of PFN types", (i+1)/1024); + goto failed; + } + } + + return 0; + +failed: + if ( minfo->pfn_type ) + { + free(minfo->pfn_type); + minfo->pfn_type = NULL; + } + if ( minfo->p2m_table ) + { + munmap(minfo->p2m_table, P2M_FLL_ENTRIES * PAGE_SIZE); + minfo->p2m_table = NULL; + } + + return -1; +} + int xc_domain_memory_mapping( xc_interface *xch, uint32_t domid, |